* Initialization for new repos AUTOMATED.

* Adding new users AUTOMATED.
* Update docs for the new, more simplified installation processes.
* Remove dependency on any particular paths, etc.  Copy "bin" into a place along your path and everything should "just work".
* Add support for Mercurial (not tested).
* blackbox_addadmin now adds keys to the keyring for you.
* Unified #! lines to "#!/usr/bin/env bash" so it works better on FreeBSD.
* BUGFIX: (BugId#1) blackbox_update_all_files.sh expects hg, fails for git.
* BUGFIX: (BugId#2) blackbox_postdeploy.sh assumes certain directory layout.
* BUGFIX: Temporary files aren't deleted.
* NEW FILE: bin/blackbox_initialize: Automates enabling BB for a repo (creates directories, files, and updates .gitignore).
* NEW FILE: bin/blackbox_removeadmin: Automates removing an admit.
* NEW FILE: tools/confidence_test.sh: A battery of tests to verify operations.
* NEW FILE: bin/Makefile: Automate package creation.
* NEW FILE: bin/_stack_lib.sh: A library of shell routines from StackExchange.

bin/_stack_lib.sh

@@ -0,0 +1,140 @@
+# Library functions for bash scripts at Stack Exchange.
+
+# Usage:
+#   . _stack_lib.sh
+
+# ----- Utility Functions -----
+
+function debugmsg() {
+  # Log to stderr.
+  echo 1>&2 LOG: """$@"""
+  :
+}
+
+function logit() {
+  # Log to stderr.
+  echo 1>&2 LOG: """$@"""
+}
+
+function fail_out() {
+    echo "FAILED:" "$*"
+    echo 'Exiting...'
+    exit 1
+}
+
+# on_exit and add_on_exit from http://www.linuxjournal.com/content/use-bash-trap-statement-cleanup-temporary-files
+# Usage:
+#   add_on_exit rm -f /tmp/foo
+#   add_on_exit echo "I am exiting"
+#   tempfile=$(mktemp)
+#   add_on_exit rm -f "$tempfile"
+function on_exit()
+{
+    for i in "${on_exit_items[@]}"
+    do
+        eval $i
+    done
+}
+
+function add_on_exit()
+{
+    local n=${#on_exit_items[*]}
+    on_exit_items[$n]="$*"
+    if [[ $n -eq 0 ]]; then
+        trap on_exit EXIT
+    fi
+}
+
+# Securely and portably create a temporary file that will be deleted
+# on EXIT.  $1 is the variable name to store the result.
+function make_self_deleting_tempfile() {
+  local __resultvar="$1"
+  local name
+
+  case $(uname -s) in
+    Darwin )
+      : ${TMPDIR:=/tmp} ;
+      name=$(mktemp -t _stacklib_ )
+      ;;
+    Linux )
+      name=$(mktemp)
+      ;;
+    * )
+      echo 'ERROR: Unknown OS. Exiting.'
+      exit 1
+      ;;
+  esac
+
+  add_on_exit rm -f "$name"
+  eval $__resultvar="$name"
+}
+
+function make_tempdir() {
+  local __resultvar="$1"
+  local name
+
+  case $(uname -s) in
+    Darwin )
+      : ${TMPDIR:=/tmp} ;
+      name=$(mktemp -d -t _stacklib_ )
+      ;;
+    Linux )
+      name=$(mktemp -d)
+      ;;
+    * )
+      echo 'ERROR: Unknown OS. Exiting.'
+      exit 1
+      ;;
+  esac
+
+  eval $__resultvar="$name"
+}
+
+function make_self_deleting_tempdir() {
+  local __resultvar="$1"
+  local dirname
+
+  make_tempdir dirname
+
+  add_on_exit rm -rf "$dirname"
+  eval $__resultvar="$dirname"
+}
+
+function fail_if_not_running_as_root() {
+  if [[ $EUID -ne 0 ]]; then
+    echo 'ERROR: This command should only be run as root.'
+    echo 'Exiting...'
+    exit 1
+  fi
+}
+
+function fail_if_in_root_directory() {
+  # Verify nobody has tricked us into being in "/".
+  case $(uname -s) in
+    Darwin )
+      if [[ $(stat -f'%i' / ) == $(stat -f'%i' . ) ]] ; then
+        echo 'SECURITY ALERT: The current directory is the root directory.'
+        echo 'Exiting...'
+        exit 1
+      fi
+      ;;
+    Linux )
+      if [[ $(stat -c'%i' / ) == $(stat -c'%i' . ) ]] ; then
+        echo 'SECURITY ALERT: The current directory is the root directory.'
+        echo 'Exiting...'
+        exit 1
+      fi
+      ;;
+    CYGWIN* )
+      if [[ $(stat -c'%i' / ) == $(stat -c'%i' . ) ]] ; then
+        echo 'SECURITY ALERT: The current directory is the root directory.'
+        echo 'Exiting...'
+        exit 1
+      fi
+      ;;
+    * )
+      echo 'ERROR: Unknown OS. Exiting.'
+      exit 1
+      ;;
+  esac
+}